Knowledge

Six nines in pi

Source 📝

203: 654: 120:
The early string of six 9s is also the first occurrence of four and five consecutive identical digits. The next sequence of six consecutive identical digits is again composed of 9s, starting at position 193,034. The next distinct sequence of six consecutive identical digits after that starts with the
163:
9 6446229489 5493038196 4428810975 6659334461 2847564823 3786783165 2712019091 4564856692 3460348610 4543266482 1339360726 0249141273 7245870066 0631558817 4881520920 9628292540 9171536436 7892590360 0113305305 4882046652 1384146951 9415116094 3305727036 5759591953 0921861173 8193261179 3105118548
82:, when I was a crazy high-school kid. My never-attained ambition was to reach the spot, 762 digits out in the decimal expansion, where it goes "999999", so that I could recite it out loud, come to those six 9s, and then impishly say, "and so on!" 94:, who allegedly stated this same idea in a lecture. However it is not clear when, or even if, Feynman made such a statement. It is not mentioned in published biographies or in his autobiographies, and is unknown to his biographer, 353: 124:
The positions of the first occurrence of a string of 1, 2, 3, 4, 5, 6, 7, 8, and 9 consecutive 9s in the decimal expansion are 5; 44; 762; 762; 762; 762; 1,722,776; 36,356,642; and 564,665,206, respectively (sequence
345: 170:
5681271 4526356082 7785771342 7577896091 7363717872 1468440901 2249534301 4654958537 1050792279 6892589235 4201995611 2129021960 8640344181 5981362977 4771309960 5187072113 4
432: 117:. For a normal number sampled uniformly at random, the probability of a specific sequence of six digits occurring this early in the decimal representation is about 0.08%. 151:
3.1415926535 8979323846 2643383279 5028841971 6939937510 5820974944 5923078164 0628620899 8628034825 3421170679 8214808651 3282306647 0938446095 5058223172 5359408128 48
261: 164:
0744623799 6274956735 1885752724 8912279381 8301194912 9833673362 4406566430 8602139494 6395224737 1907021798 6094370277 0539217176 2931767523 8467481846 7669405132
639: 553: 184:
313 7838752886 5875332083 8142061717 7669147303 5982534904 2875546873 1159562863 8823537875 9375195778 1857780532 1712268066 1300192787 66
147:(1,000 decimal places), showing consecutive runs of three or more digits including the consecutive six 9's underlined, are as follows: 132: 442: 609: 236: 570: 315: 799: 415: 325: 270: 546: 749: 468: 17: 494: 539: 687: 804: 226: 49: 178:
837 2978049951 0597317328 1609631859 5024459455 3469083026 4252230825 3344685035 2619311881 7101
579: 653: 744: 619: 8: 755: 692: 629: 682: 599: 562: 311: 208: 70: 65: 770: 738: 697: 411: 321: 266: 202: 722: 707: 677: 589: 519: 437: 91: 61: 788: 114: 48:), starting at the 762nd decimal place. It has become famous because of the 27:
Sequence of digits in the math constant π, incorrectly attributed to Feynman
717: 95: 794: 341: 221: 110: 702: 531: 524: 464: 672: 231: 216: 490: 376: 37: 52:, and because of the idea that one could memorize the digits of 286: 127: 262:
The Penguin Dictionary of Curious and Interesting Numbers
41: 775:
By Hofstadter and the Fluid Analogies Research Group
198: 86:
This sequence of six nines is sometimes called the "
64:. The earliest known mention of this idea occurs in 310: 265:, Middlesex, England: Penguin Books, p. 51, 786: 433:"Knowledge turns 15 on Friday (citation needed)" 547: 401: 399: 397: 430: 340: 405: 554: 540: 394: 304: 457: 56:up to that point, and then suggest that 491:"The Digits of Pi — First ten thousand" 254: 252: 14: 787: 561: 497:from the original on 21 September 2012 610:Fluid Concepts and Creative Analogies 535: 424: 374: 346:"Douglass Hofstadter's Pi in the Sky" 334: 258: 101: 249: 138: 78:I myself once learned 380 digits of 406:Arndt, J. & Haenel, C. (2001), 24: 25: 816: 513: 356:from the original on 13 July 2017 34:sequence of six consecutive nines 652: 471:from the original on 5 July 2018 431:David Brooks (12 January 2016). 201: 410:, Berlin: Springer, p. 3, 750:Indiana University Bloomington 483: 368: 279: 13: 1: 242: 121:digit 8 at position 222,299. 40:representation of the number 7: 194: 10: 821: 143:The first 1,001 digits of 74:, where Hofstadter states 769:Edited by Hofstadter and 765: 731: 661: 650: 569: 113:, but not known, to be a 800:Recreational mathematics 227:Mathematical coincidence 50:mathematical coincidence 157:74502 8410270193 852110 688:Hofstadter's butterfly 84: 640:Surfaces and Essences 381:mathworld.wolfram.com 76: 745:Egbert B. Gebstadter 620:Le Ton beau de Marot 237:Ramanujan's constant 756:Victim of the Brain 630:I Am a Strange Loop 580:Gödel, Escher, Bach 375:Weisstein, Eric W. 350:The Washington Post 312:Hofstadter, Douglas 90:", after physicist 600:Metamagical Themas 563:Douglas Hofstadter 445:on 18 January 2017 317:Metamagical Themas 259:Wells, D. (1986), 209:Mathematics portal 102:Related statistics 71:Metamagical Themas 66:Douglas Hofstadter 782: 781: 771:Daniel C. Dennett 739:Robert Hofstadter 698:Hofstadter points 139:Decimal expansion 16:(Redirected from 812: 723:Superrationality 708:Platonia dilemma 693:Hofstadter's law 656: 645: 635: 625: 615: 605: 595: 585: 556: 549: 542: 533: 532: 507: 506: 504: 502: 487: 481: 480: 478: 476: 461: 455: 454: 452: 450: 441:. Archived from 428: 422: 420: 403: 392: 391: 389: 387: 372: 366: 365: 363: 361: 338: 332: 331: 308: 302: 301: 299: 297: 287:"A048940 - OEIS" 283: 277: 275: 256: 211: 206: 205: 191: 190:95909 2164201989 177: 146: 130: 108: 81: 59: 55: 47: 21: 820: 819: 815: 814: 813: 811: 810: 809: 805:Richard Feynman 785: 784: 783: 778: 761: 727: 713:Six nines in pi 678:BlooP and FlooP 666: 664: 657: 648: 643: 633: 623: 613: 603: 593: 583: 565: 560: 520:"Feynman Point" 516: 511: 510: 500: 498: 489: 488: 484: 474: 472: 463: 462: 458: 448: 446: 438:Concord Monitor 429: 425: 418: 404: 395: 385: 383: 377:"Feynman Point" 373: 369: 359: 357: 339: 335: 328: 320:. Basic Books. 309: 305: 295: 293: 285: 284: 280: 273: 257: 250: 245: 207: 200: 197: 171: 150: 144: 141: 126: 106: 104: 92:Richard Feynman 79: 57: 53: 45: 28: 23: 22: 15: 12: 11: 5: 818: 808: 807: 802: 797: 780: 779: 777: 776: 773: 766: 763: 762: 760: 759: 752: 747: 742: 735: 733: 729: 728: 726: 725: 720: 715: 710: 705: 700: 695: 690: 685: 680: 675: 669: 667: 662: 659: 658: 651: 649: 647: 646: 636: 626: 616: 606: 596: 586: 575: 573: 567: 566: 559: 558: 551: 544: 536: 530: 529: 515: 514:External links 512: 509: 508: 482: 456: 423: 416: 408:Pi – Unleashed 393: 367: 344:(5 May 1985). 333: 326: 303: 278: 271: 247: 246: 244: 241: 240: 239: 234: 229: 224: 219: 213: 212: 196: 193: 140: 137: 103: 100: 36:occurs in the 26: 9: 6: 4: 3: 2: 817: 806: 803: 801: 798: 796: 793: 792: 790: 774: 772: 768: 767: 764: 758: 757: 753: 751: 748: 746: 743: 740: 737: 736: 734: 730: 724: 721: 719: 716: 714: 711: 709: 706: 704: 701: 699: 696: 694: 691: 689: 686: 684: 681: 679: 676: 674: 671: 670: 668: 660: 655: 642: 641: 637: 632: 631: 627: 622: 621: 617: 612: 611: 607: 602: 601: 597: 592: 591: 587: 582: 581: 577: 576: 574: 572: 568: 564: 557: 552: 550: 545: 543: 538: 537: 534: 527: 526: 521: 518: 517: 496: 492: 486: 470: 466: 460: 444: 440: 439: 434: 427: 419: 417:3-540-66572-2 413: 409: 402: 400: 398: 382: 378: 371: 355: 351: 347: 343: 337: 329: 327:0-465-04566-9 323: 319: 318: 313: 307: 292: 288: 282: 274: 272:0-14-026149-4 268: 264: 263: 255: 253: 248: 238: 235: 233: 230: 228: 225: 223: 220: 218: 215: 214: 210: 204: 199: 192: 189: 188: 183: 182: 176: 175: 169: 168: 162: 161: 156: 155: 148: 136: 134: 129: 122: 118: 116: 115:normal number 112: 99: 97: 93: 89: 88:Feynman point 83: 75: 73: 72: 68:'s 1985 book 67: 63: 51: 43: 39: 35: 30: 19: 18:Feynman point 754: 718:Strange loop 712: 663:Concepts and 638: 628: 618: 608: 598: 590:The Mind's I 588: 578: 523: 499:. Retrieved 485: 473:. Retrieved 459: 447:. Retrieved 443:the original 436: 426: 407: 384:. Retrieved 380: 370: 358:. Retrieved 349: 342:Rucker, Rudy 336: 316: 306: 294:. Retrieved 290: 281: 260: 186: 185: 180: 179: 173: 172: 166: 165: 159: 158: 153: 152: 149: 142: 123: 119: 105: 96:James Gleick 87: 85: 77: 69: 33: 31: 29: 501:25 November 465:"Pi Search" 449:10 February 111:conjectured 789:Categories 475:1 February 243:References 222:9 (number) 703:MU puzzle 525:MathWorld 360:4 January 741:(father) 673:Ambigram 665:projects 495:Archived 469:Archived 354:Archived 314:(1985). 291:oeis.org 232:Repdigit 217:0.999... 195:See also 62:rational 732:Related 683:Copycat 528:article 131:in the 128:A048940 38:decimal 644:(2013) 634:(2007) 624:(1997) 614:(1995) 604:(1985) 594:(1981) 584:(1979) 414:  324:  269:  174:999999 571:Books 386:1 May 296:1 May 503:2006 477:2007 451:2016 412:ISBN 388:2023 362:2016 322:ISBN 298:2023 267:ISBN 133:OEIS 187:111 181:000 167:000 160:555 154:111 135:). 109:is 60:is 795:Pi 791:: 493:. 467:. 435:. 396:^ 379:. 352:. 348:. 289:. 251:^ 98:. 42:pi 32:A 555:e 548:t 541:v 522:— 505:. 479:. 453:. 421:. 390:. 364:. 330:. 300:. 276:. 145:π 107:π 80:π 58:π 54:π 46:π 44:( 20:)

Index

Feynman point
decimal
pi
mathematical coincidence
rational
Douglas Hofstadter
Metamagical Themas
Richard Feynman
James Gleick
conjectured
normal number
A048940
OEIS
icon
Mathematics portal
0.999...
9 (number)
Mathematical coincidence
Repdigit
Ramanujan's constant


The Penguin Dictionary of Curious and Interesting Numbers
ISBN
0-14-026149-4
"A048940 - OEIS"
Hofstadter, Douglas
Metamagical Themas
ISBN
0-465-04566-9

Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.